Airtel - stolen mobile/block prepaid number

my mobile stolen on 22-8-2008 at 8.30 pm .as i want my sim to be block but there is no customer care service available...
so please as soon as possible block my no.09910072509. as somebody in missusing my no. at arount 12 am .

my mobile stolen on 22-8-2008 at 10.30 am .as i want my sim to be block but there is no customer care service available...
so please as soon as possible block my no.09910136954. as somebody is missusing my no. .